Abstract: Objective: To investigate the ultrasonographic characteristics of bicuspid aortic valve deformity. Methods: Seventy-one patients with bicuspid aortic valve deformity were divided into group Ⅰ( 9 cases， age less than 20 years) ， groupⅡ( 15 cases， age from 20 to 39 years) ，group Ⅲ( 31 cases，age from 40 to 59 years) and group Ⅳ( 16 cases，age more than 59 years) . The morphology，hemodynamics and cardiomorphology of all patients were observed by echocardiography. Results: The aortic valve calcification increased with the growth of age， group Ⅲ and Ⅳ were higher than group Ⅰ( P ＜ 0. 05 and P ＜ 0. 01) . The aortic stenosis and valvularinadequacy showed an upward trend with the age increasing，groupⅡ，Ⅲ and Ⅳ were higher than group Ⅰ( P ＜ 0. 05 to P ＜ 0. 01) . With the growth of age， the ascending aorta inner diameter and thickness of interventricular septum widened and thickened， groupⅡ，Ⅲ and Ⅳ were higher than group Ⅰ( P ＜ 0. 05 to P ＜ 0. 01) ， group Ⅲ and Ⅳ were higher than group Ⅱ( P ＜ 0. 05 to P ＜ 0. 01) . Anteroposterior diameter of the left ventricle increased， groupⅡ，Ⅲ and Ⅳ were higher than groupⅠ( P ＜ 0. 05 to P ＜ 0. 01) . Left ventricular posterior wall of four groups thickened， their differences of which were statistically significant( P ＜ 0. 05 to P ＜ 0. 01) . Conclusions: Bicuspid aortic valve deformity is closely related to the patient's age. Echocardiography has important value in the diagnosis of bicuspid aortic valve deformity.